Quick Seafood Boil with Fresh Shrimp Delight

Ingredients

• 6 quarts water
• 1/2 cup Old Bay Seasoning (or to taste)
• 1 tablespoon salt
• 2 lemons, halved
• 2 pounds small waxy potatoes, quartered
• 4 ears corn on the cob, cut into thirds
• 1 pound Andouille sausage (or smoked sausage), sliced into rounds
• 1 1/2 pounds large shrimp, deveined and shells on
• (optional) 1 pound mussels or clams, cleaned and debearded
• (for serving) melted butter, about ½ cup
• (for garnish) chopped fresh parsley or chives